The game against the Eagles on Thursday will mark only the second time in team history that Dallas has worn all-blue at home.

Generally, the Cowboys usually wear white jerseys when they play at home.

According to the Cowboys website, the tradition of wearing white at home started because former general manager Tex Schramm didn’t want fans to get bored looking at the same uniform combinations every week.

If the Cowboys wore blue uniforms at home and the road team was wearing white, then the combination on the field would always be blue and white. By putting the Cowboys in white, there was almost always a new color on the field, from the Chiefs’ red to the Eagles’ green to the Vikings’ purple.

The only time the Cowboys had ever worn blue at home before last year was in Thanksgiving games played before 2013, but those uniforms weren’t all-blue.

The uniform combination Dallas usually wears on Thanksgiving is the throwback one pictured above. That combo features a blue jersey with white shoulders and a white helmet.

Instead of wearing their throwbacks with silver helmets, the Cowboys just decided to start a new tradition all together: wear their regular blue jerseys at home.

The Cowboys also had another rare happening with their all-blue tops this year: They wore them in back-to-back weeks. Dallas wore blue at Tennessee in Week 2 and at St. Louis in Week 3, marking the first time since 2005 that they wore the blue jerseys in consecutive weeks.